EP2199722A2 - Exhaust gas cooler - Google Patents
Exhaust gas cooler Download PDFInfo
- Publication number
- EP2199722A2 EP2199722A2 EP09177831A EP09177831A EP2199722A2 EP 2199722 A2 EP2199722 A2 EP 2199722A2 EP 09177831 A EP09177831 A EP 09177831A EP 09177831 A EP09177831 A EP 09177831A EP 2199722 A2 EP2199722 A2 EP 2199722A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust
- exhaust pipe
- longitudinal direction
- recesses
- inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002826 coolant Substances 0.000 claims abstract description 75
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 4
- 239000010935 stainless steel Substances 0.000 claims abstract description 4
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000010422 painting Methods 0.000 claims 2
- 239000007789 gas Substances 0.000 description 52
- 238000010276 construction Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 208000000260 Warts Diseases 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 201000010153 skin papilloma Diseases 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
- F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
- F28F1/424—Means comprising outside portions integral with inside portions
- F28F1/426—Means comprising outside portions integral with inside portions the outside portions and the inside portions forming parts of complementary shape, e.g. concave and convex
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
- F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F2001/027—Tubular elements of cross-section which is non-circular with dimples
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
Definitions
- the present invention relates to an exhaust gas cooler, in particular for exhaust gas recirculation of an internal combustion engine, preferably of a motor vehicle, having the features of the preamble of claim 1.
- An exhaust gas cooler comprising an exhaust gas inlet communicating with an inlet chamber, an exhaust gas outlet communicating with an outlet chamber, a plurality of exhaust pipes configured as flat tubes extending parallel to each other through a coolant chamber and communicating with the one hand
- the intake chamber communicates with the exhaust chamber, a coolant inlet communicated with the coolant chamber, and a coolant outlet communicated with the coolant chamber.
- the exhaust pipes on opposite sides on a plurality of outwardly projecting bulges, which are spaced apart in the longitudinal direction of the exhaust pipes. About these bulges, adjacent exhaust pipes are based directly on each other.
- the bulges are arranged so that the bulges of the respective exhaust pipe are supported on the bulges of the respective adjacent exhaust pipe.
- the heights of the individual bulges add up to a comparatively large distance between adjacent exhaust pipes.
- a flow-through coolant path is generated between adjacent exhaust pipes.
- the individual bulges are respectively arranged along straight lines which extend inclined by approximately 45 ° relative to the longitudinal direction of the exhaust gas pipes.
- the present invention is concerned with the problem of providing for an exhaust gas cooler of the type mentioned an improved embodiment, which is characterized in particular by a high cooling capacity with extremely compact design.
- the exhaust gas cooler should be relatively inexpensive to implement.
- the invention is based on a first solution based on the general idea, the lobes, which are formed on the opposite sides of the exhaust pipes to be arranged so that in the mounted state, the bulges of the one exhaust pipe between each two bulges of the other exhaust pipe directly to this other exhaust pipe issue. It is clear that this can not apply to all bulges of the respective exhaust pipe, since at least the outer, so arranged in the region of the longitudinal ends of the respective exhaust pipe protrusions on each adjacent exhaust pipe only have an adjacent bulge.
- the proposed construction reduces the distance between adjacent exhaust pipes on the height of the bulges, ie the extent to which the bulges of protrude the respective side of the associated exhaust pipe.
- the individual protrusions on the respective side of the respective exhaust pipe along a straight line may be adjacent to each other, which extends parallel to the longitudinal direction of the respective exhaust pipe. This results in a comparatively easy to produce geometry. In addition, comparatively much surface can be provided for heat transfer.
- the bulges may each have a rectilinear shape, wherein a longitudinal direction of these rectilinear bulges with respect to the longitudinal direction of the respective exhaust pipe is inclined.
- the bulges receive a flow guiding function, which passes the coolant in the longitudinal direction of the bulges through the coolant path, which is formed between adjacent exhaust pipes. For example, this allows the countercurrent principle to be supported in the flow through the exhaust gas cooler.
- bulges are conceivable, which are designed circular in a direction oriented perpendicular to the plane of the respective exhaust pipe projection.
- the bulges of one exhaust pipe in the region of the recesses of the other exhaust pipe can now abut the other exhaust pipe, that in each case a transversely to the longitudinal direction of the exhaust gas flowable coolant path is formed, which communicates at its ends with the coolant chamber and the between its ends is limited on the one hand by the respective recess and on the other hand by the respective bulge.
- additional surface area is thus created in the coolant space as well, which is in contact with the coolant and improves the heat transfer between the exhaust pipe and the coolant. This also causes a flow deflection, which also favors the heat transfer between the exhaust pipe and coolant.
- the present invention is based on the general idea of contacting adjacent exhaust pipes directly on the sides facing each other, wherein in these sides inwardly projecting depressions are introduced, such that they form at least one transverse to the longitudinal direction of the exhaust pipes coolant path communicating with the coolant chamber.
- the exhaust gas cooler is extremely compact. Sufficient surface area is created by the depressions to realize the heat transfer between the exhaust pipe and the coolant. This embodiment also manages without fins between adjacent exhaust pipes and builds accordingly inexpensive.
- the recesses which are incorporated in the opposite sides of the exhaust pipes, transversely to the longitudinal direction of the respective exhaust pipe to be adjacent to each other.
- the heat transfer between the coolant and the exhaust pipes is improved.
- an embodiment in which the recesses extend continuously from one longitudinal end region of the respective exhaust pipe to the other longitudinal end region of the respective exhaust pipe is advantageous.
- This design favors a cross-exchange of coolant, which can also be used advantageously for the heat transfer between the exhaust pipes and the coolant.
- Fig. 1 - 4th comprises an exhaust gas cooler 1, which is preferably an exhaust gas recirculation cooler, an exhaust gas inlet 2 and an exhaust gas outlet 3.
- the exhaust gas inlet 2 communicates with an inlet chamber 4, while the exhaust gas outlet 3 communicates with an outlet chamber 5.
- An exhaust gas flow 6 leading to the exhaust gas cooler 1 and leading away from the exhaust gas cooler 1 is indicated by arrows.
- the exhaust gas cooler 1 may preferably be used in an exhaust gas recirculation system of an internal combustion engine in order to cool recirculated exhaust gases.
- the internal combustion engine is preferably arranged in a motor vehicle.
- the exhaust gas cooler 1 has a plurality of exhaust pipes 7. These are according to the Fig. 3 - 17 designed as flat tubes. This means that the exhaust pipes 7 are significantly wider in cross section than high. For example, they are at least five times or at least ten times wider than high.
- the exhaust pipes 7 are expediently designed as identical parts.
- the exhaust pipes 7 extend parallel to each other and thereby extend through a coolant chamber 8 of the exhaust gas cooler 1.
- the exhaust pipes 7 are connected on the one hand communicating with the inlet chamber 4 and on the other hand with the outlet chamber 5.
- the exhaust gas cooler 1 has a coolant inlet 9, which is connected to the coolant chamber 8, and a coolant outlet 10, which is also communicatively connected to the coolant chamber 8.
- a coolant flow 11 is in Fig. 1 symbolically indicated by arrows.
- the exhaust gas cooler 1 is integrated into the exhaust gas flow 6 and into the coolant flow 11 in such a way that a flow is formed in countercurrent.
- the exhaust pipes 7 pass through a wall 12 on the inlet side and a wall 13 on the outlet side.
- the exhaust pipes 7 are attached to these walls 12, 13 in a gas-tight manner.
- the inlet side wall 12 separates the coolant chamber 8 from the inlet chamber 4.
- the outlet side wall 13 separates the coolant chamber 8 from the outlet chamber 5.
- the coolant chamber 8 is enclosed by a housing 14.
- a cross section 15 of the housing 14 is larger than a in Fig. 4 It is also larger than a cross section of the exhaust gas inlet 2, not shown here.
- the cross section of the exhaust gas inlet 2 is the same size as the cross section 16 of the exhaust gas outlet 3.
- the inlet chamber 4 is corresponding to the Fig.
- an inlet funnel 17 connects the exhaust gas inlet 2 to the housing 14, the outlet funnel 18 creates a connection between the housing 14 and the exhaust gas outlet 3.
- At least one of the funnels 17, 18 is fitted onto the housing 14 from outside.
- both funnels 17, 18 are plugged onto the housing 14 from the outside.
- an axial overlap region 19 is created, which in Fig. 2 indicated by a curly bracket. In this overlap region 19 and the respective wall 12 and 13 is arranged. Visible pushes the respective wall 12, 13 at the edge on an unspecified inside of the housing 14 and is connected to shock with the housing 14.
- the exhaust gas cooler 1 here has an inlet flange 21 and an outlet flange 22, with the aid of which the exhaust gas cooler 1 can be integrated into an exhaust gas recirculation line.
- the inlet flange 21 of the exhaust inlet 2 is arranged.
- an inlet pipe 23 is provided, which has the exhaust gas inlet 2 and on the one hand projects into the inlet flange 21 and on the other hand protrudes into the inlet funnel 17.
- an outlet pipe 24 is provided which, on the one hand, projects into the outlet funnel 18 and, on the other hand, projects into the outlet flange 22.
- this outlet pipe 24 has the exhaust gas outlet 3.
- the coolant inlet 9 is formed on an inlet port 25, which is suitably connected to the housing 14.
- an outlet port 26 is provided which has the coolant outlet 10 and which is suitably connected to the housing 14.
- the exhaust gas cooler 1 is made entirely of stainless steel. However, at least one of the following components is made of stainless steel: inlet flange 21, inlet tube 23, inlet funnel 17, inlet side wall 12, housing 14, outlet side wall 13, outlet funnel 18, outlet tube 24, outlet flange 22, exhaust tube 7, inlet nozzle 25, outlet nozzle 26, Fastening tab 20.
- the separately produced components of the exhaust gas cooler 1 are preferably fastened to one another via welded connections.
- Corresponding Fig. 3 can be arranged in the coolant chamber 8 at least two juxtaposed stack 27, each comprising a plurality of stacked exhaust pipes 7.
- Such bulges 29 are in the embodiments of Fig. 5-13 present, while in the embodiment of the Fig. 14 - 17 are not available. About these bulges 29 are supported adjacent exhaust pipes 7 in the embodiments of Fig. 5-13 directly to each other.
- bulges 29 in the embodiments presented here are the Fig. 5-13 arranged and configured so that at the superposed exhaust pipes 7, the bulges 29 of the one exhaust pipe 7 - apart from the respective first bulge 29 and the last bulge 29 - between two adjacent bulges 29 of the other exhaust pipe 7 directly to this other exhaust pipe. 7 issue.
- all bulges 29 of the one exhaust pipe 7 are in each case in the longitudinal direction 30 spaced from the nearest bulge 29 of the other exhaust pipe 7 directly to this other exhaust pipe 7 at.
- the distance between adjacent exhaust pipes 7 corresponds to the height of the bulges 29.
- the individual bulges 29 are arranged on the respective side 28 of the associated exhaust pipe 7 along a straight line 31 which extends parallel to the longitudinal direction 30 of the associated exhaust pipe 7.
- the bulges 29 may be arranged offset within the respective exhaust pipe 7 on the opposite sides 28 in the longitudinal direction 30 to each other.
- the offset carried out in the longitudinal direction 30 is expediently dimensioned such that it corresponds to half of a distance 32 measured in the longitudinal direction 30 between two adjacent bulges 29.
- the bulges 29 of one side are arranged with respect to a projection oriented perpendicular to the plane of the respective exhaust pipe 7 between, in particular centrally, two adjacent bulges 29 of the other side 28 of this exhaust pipe 7.
- each of the bulges 29 have a rectilinear shape.
- a longitudinal direction 33 of these rectilinear bulges 29 is aligned with respect to the longitudinal direction 30 of the associated exhaust pipe 7 inclined.
- the longitudinal direction 33 of the respective rectilinear bulge 29 is inclined by approximately 45 ° with respect to the longitudinal direction 30.
- the angle included between said longitudinal directions 33 and 30 is in a range of from 40 ° to 50 ° inclusive.
- all rectilinear bulges 29 are oriented parallel to each other on the respective side 28 of the associated exhaust pipe 7.
- the straight lobes 29 are inclined in the same direction and in particular parallel to each other with respect to the longitudinal direction 30 of the associated exhaust pipe 7 at the respective exhaust pipe 7 on the two opposite sides 28, in particular in a perpendicular to the plane of the respective exhaust pipe 7 projection.
- the Fig. 9 - 13 show another embodiment or a different shape for the bulges 29.
- they are designed in a projection which is oriented perpendicular to the plane of the respective exhaust pipe 7, circular.
- the bulges 29 are thus designed wart-shaped.
- they are each arranged centrally on the respective side 28 with respect to the broad direction of the respective exhaust pipe 7.
- the exhaust pipes 7 on the opposite sides 28 also more, inwardly projecting recesses 34. These are also spaced apart in the longitudinal direction 30 of the associated exhaust pipe 7. It is useful in the embodiments of the Fig. 5-13 shown arrangement in which 30 recesses 34 and bulges 29 alternate in the longitudinal direction. In each case a bulge 29 is arranged between two adjacent recesses 34.
- the recesses 34 are each formed in a straight line. They have a longitudinal direction 35, which also extends inclined relative to the longitudinal direction 30 of the associated exhaust pipe 7. It is expedient that all recesses 34 of the respective exhaust pipe 7 extend parallel to each other.
- the angle which the longitudinal direction 35 of the recesses 34 encloses with the longitudinal direction 30 of the associated exhaust pipe 7 is between 40 ° and 50 ° inclusive. In the example shown, said angle is 45 °.
- the longitudinal direction 33 of the bulges 29 extend parallel to the longitudinal direction 35 of the depressions 34.
- the depressions 34 on the two opposite sides 28 of the same exhaust gas pipe 7 are in the same direction with respect to the longitudinal direction 30 of the exhaust pipe 7 are inclined, resulting in the projection perpendicular to the plane of the respective exhaust pipe 7, a parallel arrangement of the rectilinear recesses 34 and the rectilinear bulges 29 results.
- the Fig. 5-13 are the recesses 34 in the longitudinal direction 30 of the associated exhaust pipe 7 narrower or shorter than the bulges 29. Further, the recesses 34 are transverse to the longitudinal direction 30 of the associated exhaust pipe 7 is greater or longer than the bulges 29. Accordingly Fig. 8
- the recesses 34 may expediently project into the interior of the respective exhaust pipe 7 so far that the recesses 34 on the opposite sides 28 abut one another in the interior of the exhaust pipe 7.
- the recesses 34 each protrude with a depth or height the exhaust pipe 7 in, which corresponds to half the distance of the opposite sides 28 of the exhaust pipe 7.
- the Fig. 5-13 are the recesses 34 and the bulges 29 coordinated so that the bulges 29 of the one exhaust pipe 7 in the region of the recesses 34 of the other exhaust pipe 7 abut the respective adjacent or other exhaust pipe 7, in such a way that thereby a coolant path is formed transversely to the longitudinal direction 30 of the exhaust pipes 7 can be flowed through.
- the respective coolant path is communicatively connected at its ends to the coolant chamber 8, since the bulges 29 can not completely cover the opposite depression 34. Between its ends, the respective coolant path is then delimited on the one hand by the respective depression 34 or by its wall and on the other hand by the respective bulge 29 or by its wall. With the help of these coolant paths, a targeted flow through the depressions 34 and flow around the bulges 29 is achieved. In this way, more surface may contact the coolant, which improves the heat transfer between the exhaust pipes 7 and the coolant.
- the exhaust pipes 7 each have a plurality of inwardly projecting recesses 36 on the opposite sides 28. In this embodiment, however, no bulges 29 are present.
- spacers can be provided, in addition, then either an edge, where no wave is, or the shaft can be interrupted.
- adjacent exhaust pipes 7 on the sides 28, which contain the recesses 36 lie directly and flat against each other and preferably be flat. For example, a distance of more than 1 mm can be maintained.
- the recesses 36 are configured or arranged so that they on the adjoining sides 28 and form at least one coolant path between adjacent exhaust pipes 7, which can be flowed through transversely to the longitudinal direction 30 of the exhaust pipes 7. Also, this coolant path communicates with the coolant chamber. 8
- the recesses 36 are in contrast to the embodiments of Fig. 5-13 not in the longitudinal direction 30 of the exhaust pipes 7, but transversely to the longitudinal direction 30 of the exhaust pipes 7 spaced from each other or arranged adjacent to each other. As in the FIGS. 14 and 15 is clearly visible, the recesses 36 are each configured continuously, so that they extend from an inlet-side longitudinal end portion 37 of the respective exhaust pipe 7 to an outlet side longitudinal end portion 38 of the respective exhaust pipe 7. This allows a cross-exchange of coolant over the entire length of the exhaust pipes 7 done.
- the depressions 36 are designed with a wavy or serpentine shape with respect to their longitudinal direction. Also conceivable are other shapes, such as a sawtooth shape.
- the arrangement or shaping of the recesses 36 takes place in such a way that the depressions 36 of the abutting sides 38 of adjacent exhaust pipes 7 intersect several times along the longitudinal direction 30 of the exhaust pipes 7.
- coolant can pass from the depressions 36 of one exhaust pipe 7 into the recesses 36 of the other, adjacent exhaust pipe 7.
- This improves the mixing and thus the heat transfer.
- the depressions 36 are formed or arranged within the respective exhaust pipe 7 in such a way that the depressions 36 of the opposite sides 28 in the interior of the respective exhaust pipe 7 along their longitudinal direction or along the longitudinal direction 30 of the exhaust pipe. 7 cut several times.
- a projection which is oriented perpendicular to the plane of the respective exhaust pipe 7.
- Corresponding Fig. 17 protrude the wells 36 in a preferred embodiment on the opposite sides 28 of the respective exhaust pipe 7 far into the interior of the respective exhaust pipe 7 in that they touch in the interior of the exhaust pipe 7.
- a symmetrical arrangement is expedient, so that the depressions 36 of the respective side 28 each overcome approximately half the distance between the sides 28.
- the recesses 36 are preferably flat against each other.
- the indentations can protrude into the exhaust pipe about 1/6 of the clear height. This leaves a continuous space in the middle.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft einen Abgaskühler, insbesondere für eine Abgasrückführung einer Brennkraftmaschine, vorzugsweise eines Kraftfahrzeugs, mit den Merkmalen des Oberbegriffs des Anspruchs 1.The present invention relates to an exhaust gas cooler, in particular for exhaust gas recirculation of an internal combustion engine, preferably of a motor vehicle, having the features of the preamble of claim 1.
Aus der
Beim bekannten Abgaskühler sind die Ausbuchtungen so angeordnet, dass sich die Ausbuchtungen des jeweiligen Abgasrohrs an den Ausbuchtungen des jeweiligen benachbarten Abgasrohrs abstützen. Hierdurch addieren sich die Höhen der einzelnen Ausbuchtungen zu einem vergleichsweise großen Abstand zwischen benachbarten Abgasrohren. Hierdurch wird zwischen benachbarten Abgasrohren ein durchströmbarer Kühlmittelpfad erzeugt. Des Weiteren sind beim bekannten Abgaskühler die einzelnen Ausbuchtungen jeweils entlang von Geraden angeordnet, die gegenüber der Längsrichtung der Abgasrohre um etwa 45° geneigt verlaufen. Ein besonderer Vorteil der bekannten Bauweise ist die Möglichkeit, auf zusätzliche Lamellen zu verzichten, die zwischen benachbarten Abgasrohren angeordnet werden können, um den Wärmeübergang zwischen dem Kühlmittel und den Abgasrohren zu verbessern.In the known exhaust gas cooler the bulges are arranged so that the bulges of the respective exhaust pipe are supported on the bulges of the respective adjacent exhaust pipe. As a result, the heights of the individual bulges add up to a comparatively large distance between adjacent exhaust pipes. As a result, a flow-through coolant path is generated between adjacent exhaust pipes. Furthermore, in the case of the known exhaust gas cooler, the individual bulges are respectively arranged along straight lines which extend inclined by approximately 45 ° relative to the longitudinal direction of the exhaust gas pipes. A particular advantage of the known construction is the possibility to dispense with additional slats between adjacent Exhaust pipes can be arranged to improve the heat transfer between the coolant and the exhaust pipes.
Aus der
Die vorliegende Erfindung beschäftigt sich mit dem Problem, für einen Abgaskühler der eingangs genannten Art eine verbesserte Ausführungsform anzugeben, die sich insbesondere durch eine hohe Kühlleistung bei extrem kompakter Bauweise auszeichnet. Außerdem soll der Abgaskühler vergleichsweise preiswert realisierbar sein.The present invention is concerned with the problem of providing for an exhaust gas cooler of the type mentioned an improved embodiment, which is characterized in particular by a high cooling capacity with extremely compact design. In addition, the exhaust gas cooler should be relatively inexpensive to implement.
Erfindungsgemäß wird dieses Problem durch die Gegenstände der unabhängigen Ansprüche gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.According to the invention, this problem is solved by the subject matters of the independent claims. Advantageous embodiments are the subject of the dependent claims.
Die Erfindung beruht gemäß einer ersten Lösung auf dem allgemeinen Gedanken, die Ausbuchtungen, die an den voneinander abgewandten Seiten der Abgasrohre ausgebildet sind, so anzuordnen, dass im montierten Zustand die Ausbuchtungen des einen Abgasrohrs jeweils zwischen zwei Ausbuchtungen des anderen Abgasrohrs unmittelbar an diesem anderen Abgasrohr anliegen. Es ist klar, dass dies nicht für alle Ausbuchtungen des jeweiligen Abgasrohrs gelten kann, da zumindest die außenliegenden, also im Bereich der Längsenden des jeweiligen Abgasrohrs angeordneten Ausbuchtungen am jeweils benachbarten Abgasrohr nur eine benachbarte Ausbuchtung besitzen. Durch die vorgeschlagene Bauweise reduziert sich der Abstand zwischen benachbarten Abgasrohren auf die Höhe der Ausbuchtungen, also auf das Maß, mit dem die Ausbuchtungen von der jeweiligen Seite des zugehörigen Abgasrohrs abstehen. Hierdurch kann der durchströmbare Querschnitt des zwischen benachbarten Abgasrohren ausgebildeten Kühlmittelpfads reduziert werden, was die Strömungsgeschwindigkeit erhöht und somit den Wärmeübergang zwischen Kühlmittel und Abgasrohr verbessert. Ferner kann bei dieser Bauweise nach wie vor auf Lamellen zwischen den benachbarten Abgasrohren verzichtet werden, was eine preiswerte Realisierung des Abgaskühler ermöglicht.The invention is based on a first solution based on the general idea, the lobes, which are formed on the opposite sides of the exhaust pipes to be arranged so that in the mounted state, the bulges of the one exhaust pipe between each two bulges of the other exhaust pipe directly to this other exhaust pipe issue. It is clear that this can not apply to all bulges of the respective exhaust pipe, since at least the outer, so arranged in the region of the longitudinal ends of the respective exhaust pipe protrusions on each adjacent exhaust pipe only have an adjacent bulge. The proposed construction reduces the distance between adjacent exhaust pipes on the height of the bulges, ie the extent to which the bulges of protrude the respective side of the associated exhaust pipe. In this way, the flow-through cross section of the coolant path formed between adjacent exhaust pipes can be reduced, which increases the flow velocity and thus improves the heat transfer between the coolant and the exhaust pipe. Furthermore, it is still possible to dispense with fins between the adjacent exhaust pipes in this construction, which allows a low-cost realization of the exhaust gas cooler.
Entsprechend einer vorteilhaften Ausführungsform können die einzelnen Ausbuchtungen an der jeweiligen Seite des jeweiligen Abgasrohrs entlang einer Geraden zueinander benachbart sein, die sich parallel zur Längsrichtung des jeweiligen Abgasrohrs erstreckt. Hierdurch ergibt sich eine vergleichsweise einfach herstellbare Geometrie. Außerdem kann vergleichsweise viel Oberfläche für die Wärmeübertragung zur Verfügung gestellt werden.According to an advantageous embodiment, the individual protrusions on the respective side of the respective exhaust pipe along a straight line may be adjacent to each other, which extends parallel to the longitudinal direction of the respective exhaust pipe. This results in a comparatively easy to produce geometry. In addition, comparatively much surface can be provided for heat transfer.
Gemäß einer anderen Ausführungsform können die Ausbuchtungen jeweils eine geradlinige Form aufweisen, wobei eine Längsrichtung dieser geradlinigen Ausbuchtungen gegenüber der Längsrichtung des jeweiligen Abgasrohrs geneigt verläuft. Hierdurch erhalten die Ausbuchtungen eine Strömungsleitfunktion, die das Kühlmittel in der Längsrichtung der Ausbuchtungen durch den Kühlmittelpfad hindurchführt, der zwischen benachbarten Abgasrohren ausgebildet ist. Beispielsweise kann hierdurch das Gegenstromprinzip bei der Durchströmung des Abgaskühlers unterstützt werden.According to another embodiment, the bulges may each have a rectilinear shape, wherein a longitudinal direction of these rectilinear bulges with respect to the longitudinal direction of the respective exhaust pipe is inclined. As a result, the bulges receive a flow guiding function, which passes the coolant in the longitudinal direction of the bulges through the coolant path, which is formed between adjacent exhaust pipes. For example, this allows the countercurrent principle to be supported in the flow through the exhaust gas cooler.
Alternativ sind jedoch auch Ausbuchtungen denkbar, die in einer senkrecht zur Ebene des jeweiligen Abgasrohrs orientierten Projektion kreisförmig ausgestaltet sind.Alternatively, however, bulges are conceivable, which are designed circular in a direction oriented perpendicular to the plane of the respective exhaust pipe projection.
Besonders vorteilhaft ist nun eine Ausführungsform, bei welcher die Abgasrohre an sich gegenüberliegenden Seiten neben den Ausbuchtungen mehrere, nach innen hineinragende Vertiefungen aufweisen, die in der Längsrichtung der Abgasrohre voneinander beabstandet sind. Dabei sind diese Vertiefungen jeweils zwischen den Ausbuchtungen angeordnet. Ebenso ist eine umgekehrte Anordnung möglich, so dass die Ausbuchtungen jeweils zwischen den Vertiefungen angeordnet sind. Allgemein wechseln sich in der Längsrichtung der Abgasrohre die Vertiefungen und die Ausbuchtungen ab. Unregelmäßige Anordnungen sind auch möglich. Diese Ausbuchtungen vergrößern im Inneren der Abgasrohre die Oberfläche, was die Wärmeübertragung zwischen Abgasrohr und Abgasströmung verbessert. Ferner wird dadurch der durchströmbare Querschnitt der Abgasrohre reduziert, was die Strömungsgeschwindigkeit des Abgases erhöht. Auch dies führt zu einer verbesserten Wärmeübertragung zwischen Abgas und Abgasrohr. Auch ist es möglich, mit Hilfe der Vertiefungen im Inneren der Abgasrohre eine vielfältige bzw. mehrfache Strömungsumlenkung zu erzwingen, die ebenfalls die Wärmeübertragung zwischen Abgas und Abgasrohr verbessert.Particularly advantageous is now an embodiment in which the exhaust pipes on opposite sides next to the bulges several, inwardly projecting recesses, which are spaced apart in the longitudinal direction of the exhaust pipes. These recesses are each arranged between the bulges. Likewise, a reverse arrangement is possible, so that the bulges are each arranged between the recesses. In general, the recesses and the bulges alternate in the longitudinal direction of the exhaust pipes. Irregular arrangements are also possible. These bulges increase the surface of the exhaust pipes, which improves the heat transfer between the exhaust pipe and exhaust gas flow. Further, the flow-through cross section of the exhaust pipes is thereby reduced, which increases the flow velocity of the exhaust gas. This also leads to improved heat transfer between exhaust and exhaust pipe. It is also possible, with the help of the recesses in the interior of the exhaust pipes to force a multiple or multiple flow deflection, which also improves the heat transfer between exhaust and exhaust pipe.
Bei einer besonders vorteilhaften Ausführungsform können nun die Ausbuchtungen des einen Abgasrohrs im Bereich der Vertiefungen des anderen Abgasrohrs so am anderen Abgasrohr anliegen, dass jeweils ein quer zur Längsrichtung der Abgasrohre durchströmbarer Kühlmittelpfad entsteht, der an seinen Enden mit der Kühlmittelkammer kommuniziert und der zwischen seinen Enden einerseits durch die jeweilige Vertiefung und andererseits durch die jeweilige Ausbuchtung begrenzt ist. Durch diese Bauweise wird somit auch im Kühlmittelraum zusätzliche Oberfläche geschaffen, die mit dem Kühlmittel in Kontakt steht und die Wärmeübertragung zwischen Abgasrohr und Kühlmittel verbessert. Auch findet dadurch eine Strömungsumlenkung statt, was ebenfalls den Wärmeübergang zwischen Abgasrohr und Kühlmittel begünstigt.In a particularly advantageous embodiment, the bulges of one exhaust pipe in the region of the recesses of the other exhaust pipe can now abut the other exhaust pipe, that in each case a transversely to the longitudinal direction of the exhaust gas flowable coolant path is formed, which communicates at its ends with the coolant chamber and the between its ends is limited on the one hand by the respective recess and on the other hand by the respective bulge. As a result of this design, additional surface area is thus created in the coolant space as well, which is in contact with the coolant and improves the heat transfer between the exhaust pipe and the coolant. This also causes a flow deflection, which also favors the heat transfer between the exhaust pipe and coolant.
Entsprechend einer zweiten Lösung beruht die vorliegende Erfindung auf dem allgemeinen Gedanken, benachbarte Abgasrohre direkt an den einander zugewandten Seiten flächig zu kontaktieren, wobei in diese Seiten nach innen hineinragende Vertiefungen eingebracht sind, derart, dass diese zumindest einen quer zur Längsrichtung der Abgasrohre durchströmbaren Kühlmittelpfad bilden, der mit der Kühlmittelkammer kommuniziert. Bei dieser Ausgestaltung baut der Abgaskühler extrem kompakt. Durch die Vertiefungen wird dabei ausreichend Oberfläche geschaffen, um den Wärmeübergang zwischen Abgasrohr und Kühlmittel zu realisieren. Auch diese Ausführungsform kommt ohne Lamellen zwischen benachbarten Abgasrohren aus und baut dementsprechend preiswert.According to a second solution, the present invention is based on the general idea of contacting adjacent exhaust pipes directly on the sides facing each other, wherein in these sides inwardly projecting depressions are introduced, such that they form at least one transverse to the longitudinal direction of the exhaust pipes coolant path communicating with the coolant chamber. In this embodiment, the exhaust gas cooler is extremely compact. Sufficient surface area is created by the depressions to realize the heat transfer between the exhaust pipe and the coolant. This embodiment also manages without fins between adjacent exhaust pipes and builds accordingly inexpensive.
Entsprechend einer vorteilhaften Ausführungsform können die Vertiefungen, die in die sich gegenüberliegenden Seiten der Abgasrohre eingearbeitet sind, quer zur Längsrichtung des jeweiligen Abgasrohrs zueinander benachbart angeordnet sein. Dies bedeutet für den zwischen benachbarten Abgasrohren ausgebildeten Kühlmittelpfad, dass dieser mehrere Strömungsumlenkungen bzw. Richtungsänderungen beinhaltet. Hierdurch wird der Wärmeübergang zwischen dem Kühlmittel und den Abgasrohren verbessert.According to an advantageous embodiment, the recesses, which are incorporated in the opposite sides of the exhaust pipes, transversely to the longitudinal direction of the respective exhaust pipe to be adjacent to each other. For the coolant path formed between adjacent exhaust pipes, this means that it contains a plurality of flow deflections or changes in direction. As a result, the heat transfer between the coolant and the exhaust pipes is improved.
Vorteilhaft ist dabei eine Ausführungsform, bei welcher sich die Vertiefungen jeweils durchgehend von einem Längsendbereich des jeweiligen Abgasrohrs bis zum anderen Längsendbereich des jeweiligen Abgasrohrs erstrecken. Diese Bauform begünstigt einen Queraustausch von Kühlmittel, was ebenfalls vorteilhaft für die Wärmeübertragung zwischen den Abgasrohren und dem Kühlmittel genutzt werden kann.In this case, an embodiment in which the recesses extend continuously from one longitudinal end region of the respective exhaust pipe to the other longitudinal end region of the respective exhaust pipe is advantageous. This design favors a cross-exchange of coolant, which can also be used advantageously for the heat transfer between the exhaust pipes and the coolant.
Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.
Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.
Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Bauteile beziehen.Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.
Es zeigen, jeweils schematisch
- Fig. 1
- eine Seitenansicht eines Abgaskühlers,
- Fig. 2
- einen Längsschnitt des Abgaskühlers entsprechend Schnittlinien II in
Fig. 1 , - Fig. 3
- einen Querschnitt des Abgaskühlers entsprechend Schnittlinien III in
Fig. 1 , - Fig. 4
- eine Frontansicht des Abgaskühlers entsprechend einer Blickrichtung IV in
Fig. 1 , - Fig. 5
- eine Ansicht von oben auf ein Abgasrohr,
- Fig. 6
- eine Ansicht von unten auf das Abgasrohr,
- Fig. 7
- einen Längsschnitt des Abgasrohrs entsprechend Schnittlinien VII in
Fig. 5 , - Fig. 8
- eine Frontansicht des Abgasrohrs entsprechend einer Blickrichtung VIII in
Fig. 5 , - Fig. 9
- eine Ansicht von oben auf ein Abgasrohr einer anderen Ausführungsform,
- Fig. 10
- eine Ansicht von unten auf das Abgasrohr aus
Fig. 9 , - Fig. 11
- eine Seitenansicht des Abgasrohrs entsprechend einer Blickrichtung XI in
Fig. 9 , - Fig. 12
- eine Stirnansicht des Abgasrohrs entsprechend einer Blickrichtung XII in
Fig. 9 , - Fig. 13
- eine Schnittansicht des Abgasrohrs entsprechend Schnittlinien XIII in
Fig. 10 , - Fig. 14
- eine Ansicht von oben auf ein Abgasrohr bei einer weiteren Ausführungsform,
- Fig. 15
- eine Ansicht von unten auf das Abgasrohr aus
Fig. 14 , - Fig. 16
- eine Seitenansicht des Abgasrohrs entsprechend einer Blickrichtung XVI in
Fig. 14 , - Fig. 17
- eine Schnittansicht des Abgasrohrs entsprechend Schnittlinien XVII in
Fig. 14 .
- Fig. 1
- a side view of an exhaust gas cooler,
- Fig. 2
- a longitudinal section of the exhaust gas cooler according to section lines II in
Fig. 1 . - Fig. 3
- a cross section of the exhaust gas cooler according to section lines III in
Fig. 1 . - Fig. 4
- a front view of the exhaust gas cooler according to a viewing direction IV in
Fig. 1 . - Fig. 5
- a view from above of an exhaust pipe,
- Fig. 6
- a view from below of the exhaust pipe,
- Fig. 7
- a longitudinal section of the exhaust pipe according to section lines VII in
Fig. 5 . - Fig. 8
- a front view of the exhaust pipe according to a viewing direction VIII in
Fig. 5 . - Fig. 9
- a top view of an exhaust pipe of another embodiment,
- Fig. 10
- a view from below of the exhaust pipe
Fig. 9 . - Fig. 11
- a side view of the exhaust pipe according to a viewing direction XI in
Fig. 9 . - Fig. 12
- an end view of the exhaust pipe according to a viewing direction XII in
Fig. 9 . - Fig. 13
- a sectional view of the exhaust pipe according to section lines XIII in
Fig. 10 . - Fig. 14
- a top view of an exhaust pipe in a further embodiment,
- Fig. 15
- a view from below of the exhaust pipe
Fig. 14 . - Fig. 16
- a side view of the exhaust pipe according to a viewing direction XVI in
Fig. 14 . - Fig. 17
- a sectional view of the exhaust pipe according to section lines XVII in
Fig. 14 ,
Entsprechend den
Der Abgaskühler 1 weist mehrere Abgasrohre 7 auf. Diese sind entsprechend den
Entsprechend
Im Beispiel sind am Gehäuse 14 zwei Befestigungslaschen 20 befestigt, mit deren Hilfe der Abgaskühler 1 an einem entsprechenden Träger oder dergleichen befestigt werden kann. Ferner besitzt der Abgaskühler 1 hier einen Einlassflansch 21 sowie einen Auslassflansch 22, mit deren Hilfe der Abgaskühler 1 in eine Abgasrückführleitung eingebunden werden kann. Im Einlassflansch 21 ist der Abgaseinlass 2 angeordnet. Hierzu ist ein Einlassrohr 23 vorgesehen, das den Abgaseinlass 2 aufweist und das einerseits in den Einlassflansch 21 hineinragt und das andererseits in den Einlasstrichter 17 hineinragt. Auslassseitig ist ein Auslassrohr 24 vorgesehen, das einerseits in den Auslasstrichter 18 hineinragt und das andererseits in den Auslassflansch 22 hineinragt. Ferner weist dieses Auslassrohr 24 den Abgasauslass 3 auf. Auch ist der Kühlmitteleinlass 9 an einem Einlassstutzen 25 ausgebildet, der auf geeignete Weise an das Gehäuse 14 angeschlossen ist. Ferner ist ein Auslassstutzen 26 vorgesehen, der den Kühlmittelauslass 10 aufweist und der auf geeignete Weise an das Gehäuse 14 angeschlossen ist.In the example, two mounting
Vorzugsweise ist der Abgaskühler 1 vollständig aus Edelstahl hergestellt. Zumindest ist jedoch wenigstens eine der folgenden Komponenten aus Edelstahl hergestellt: Einlassflansch 21, Einlassrohr 23, Einlasstrichter 17, einlassseitige Wand 12, Gehäuse 14, auslassseitige Wand 13, Auslasstrichter 18, Auslassrohr 24, Auslassflansch 22, Abgasrohr 7, Einlassstutzen 25, Auslassstutzen 26, Befestigungslasche 20. Die separat voneinander hergestellten Komponenten des Abgaskühlers 1 sind bevorzugt über Schweißverbindungen aneinander befestigt.Preferably, the exhaust gas cooler 1 is made entirely of stainless steel. However, at least one of the following components is made of stainless steel:
Entsprechend
Entsprechend den
Dabei sind diese Ausbuchtungen 29 bei den hier vorgestellten Ausführungsformen der
Bei den Ausführungsformen der
Wie insbesondere in Schnittansichten der
Im Beispiel der
Die
Bei den Ausführungsformen der
Dabei erfolgt die Positionierung der Vertiefungen 34 und der Ausbuchtungen 29 zweckmäßig so, dass die Ausbuchtungen 29 des einen Abgasrohrs 7 jeweils im Bereich wenigstens einer solchen Vertiefung 34 des dazu benachbarten anderen Abgasrohrs 7 an diesem anderen Abgasrohr 7 anliegen.The positioning of the
In den gezeigten Ausführungsformen sind die Vertiefungen 34 jeweils geradlinig ausgebildet. Dabei besitzen sie eine Längsrichtung 35, die ebenfalls gegenüber der Längsrichtung 30 des zugehörigen Abgasrohrs 7 geneigt verläuft. Dabei ist es zweckmäßig, dass sich sämtliche Vertiefungen 34 des jeweiligen Abgasrohrs 7 parallel zueinander erstrecken. Zweckmäßig liegt der Winkel, den die Längsrichtung 35 der Vertiefungen 34 mit der Längsrichtung 30 des zugehörigen Abgasrohrs 7 einschließt, zwischen einschließlich 40° und einschließlich 50°. Im gezeigten Beispiel liegt besagter Winkel bei 45°. Somit erstrecken sich in den gezeigten Beispielen die Längsrichtung 33 der Ausbuchtungen 29 parallel zur Längsrichtung 35 der Vertiefungen 34. Außerdem ist auch hier vorgesehen, dass die Vertiefungen 34 an den beiden sich gegenüberliegenden Seiten 28 des gleichen Abgasrohrs 7 in der gleichen Richtung gegenüber der Längsrichtung 30 des Abgasrohrs 7 geneigt verlaufen, wodurch sich in der Projektion senkrecht zur Ebene des jeweiligen Abgasrohrs 7 eine parallele Anordnung der geradlinigen Vertiefungen 34 und der geradlinigen Ausbuchtungen 29 ergibt.In the embodiments shown, the
Bei den hier gezeigten Ausführungsformen der
Bei den hier gezeigten Ausführungsformen der
Bei der in den
Die Vertiefungen 36 sind im Unterschied zu den Ausführungsformen der
Die Anordnung bzw. Formgebung der Vertiefungen 36 erfolgt dabei so, dass sich die Vertiefungen 36 der aneinander anliegenden Seiten 38 benachbarter Abgasrohre 7 entlang der Längsrichtung 30 der Abgasrohre 7 mehrfach schneiden. Hierdurch kann Kühlmittel von den Vertiefungen 36 des einen Abgasrohrs 7 in die Vertiefungen 36 des anderen, daran anliegenden, benachbarten Abgasrohrs 7 gelangen. Dies verbessert die Durchmischung und somit die Wärmeübertragung. Erreicht wird dies beispielsweise dadurch, dass die Vertiefungen 36 innerhalb des jeweiligen Abgasrohrs 7 so geformt bzw. angeordnet sind, dass sich die Vertiefungen 36 der sich gegenüberliegenden Seiten 28 im Inneren des jeweiligen Abgasrohrs 7 entlang ihrer Längsrichtung bzw. entlang der Längsrichtung 30 des Abgasrohrs 7 mehrfach schneiden. Betrachtet wird hierbei eine Projektion, die senkrecht zur Ebene des jeweiligen Abgasrohrs 7 orientiert ist. Betrachtet man beispielsweise die wellenförmigen Vertiefungen 36 an der oberen Seite 28 gemäß
Entsprechend
Im Beispiel sind ohne Beschränkung der Allgemeinheit an der einen Seite 28 gemäß
Claims (15)
dass bei jeweils zwei benachbarten Abgasrohren (7) die Ausbuchtungen (29) des einen Abgasrohrs (7) jeweils in der Längsrichtung (30) der Abgasrohre (7) beabstandet zur nächstliegenden Ausbuchtung (29) des anderen Abgasrohrs (7) direkt am anderen Abgasrohr (7) anliegen.Exhaust gas cooler, in particular for exhaust gas recirculation of an internal combustion engine, preferably of a motor vehicle,
that in each case two adjacent exhaust pipes (7) the bulges (29) of the one exhaust pipe (7) in each case in the longitudinal direction (30) of the exhaust pipes (7) spaced from the nearest bulge (29) of the other exhaust pipe (7) directly at the other exhaust pipe ( 7) abut.
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
dass in der Kühlmittelkammer (8) zumindest zwei Stapel (27) aufeinander gestapelter oder aneinander anliegender Abgasrohre (7) nebeneinander angeordnet sind.Exhaust cooler according to one of claims 1 to 9,
characterized,
that stacked or abutting exhaust pipes (7) are arranged side by side in the coolant chamber (8) at least two stacks (27).
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
dass die jeweilige Wand (12, 13) im Überlappungsbereich (19) des jeweiligen Trichters (17, 18) angeordnet ist.Exhaust cooler according to claims 11 and 12,
characterized,
in that the respective wall (12, 13) is arranged in the overlapping area (19) of the respective funnel (17, 18).
dadurch gekennzeichnet,
dass alle folgenden Komponenten oder zumindest eine der folgenden Komponenten aus Edelstahl hergestellt ist: Abgaseinlass (2) oder ein den Abgaseinlass (2) aufweisendes Einlassrohr (23), Abgasauslass (3) oder ein den Abgasauslass (3) aufweisendes Auslassrohr (24), Kühlmitteleinlass (9) oder ein den Kühlmitteleinlass (9) aufweisender Einlassstutzen (25), Kühlmittelauslass (10) oder ein den Kühlmittelauslass (10) aufweisender Auslassstutzen (26), Abgasrohre (7), Gehäuse (14), einlassseitige Wand (12), auslassseitige Wand (13), Einlasstrichter (17), Auslasstrichter (18), ein den Abgaseinlass (2) umfassender Einlassflansch (21), ein den Abgasauslass (3) umfassender Auslassflansch (22).Exhaust cooler according to one of claims 1 to 13,
characterized,
in that all the following components or at least one of the following components are made of stainless steel: exhaust inlet (2) or inlet pipe (23), exhaust outlet (3) or exhaust outlet (3), or exhaust pipe (24), coolant inlet (9) or an inlet pipe (25), coolant outlet (10) having the coolant inlet (9) or an outlet pipe (26), exhaust pipes (7), housing (14), inlet-side wall (12), exhaust-side Wall (13), inlet funnel (17), outlet funnel (18), an inlet flange (21) comprising the exhaust gas inlet (2), an outlet flange (22) comprising the exhaust gas outlet (3).
dadurch gekennzeichnet,
dass alle aneinander befestigten Komponenten des Abgaskühlers oder wenigstens zwei aneinander befestigte Komponenten des Abgaskühlers (1) mittels Schweißverbindungen aneinander befestigt sind.Exhaust cooler according to one of claims 1 to 14,
characterized,
in that all components of the exhaust gas cooler fixed to one another or at least two components of the exhaust gas cooler (1) fastened to one another are fastened to one another by means of welded connections.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008064090A DE102008064090A1 (en) | 2008-12-19 | 2008-12-19 | exhaust gas cooler |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP2199722A2 true EP2199722A2 (en) | 2010-06-23 |
| EP2199722A3 EP2199722A3 (en) | 2010-08-25 |
| EP2199722B1 EP2199722B1 (en) | 2012-08-01 |
Family
ID=42061035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09177831A Not-in-force EP2199722B1 (en) | 2008-12-19 | 2009-12-03 | Exhaust gas cooler |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8627880B2 (en) |
| EP (1) | EP2199722B1 (en) |
| JP (1) | JP5579428B2 (en) |
| DE (1) | DE102008064090A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012079701A1 (en) * | 2010-12-14 | 2012-06-21 | Daimler Ag | Exhaust heat exchanger of an internal combustion engine |
| US8627880B2 (en) | 2008-12-19 | 2014-01-14 | Mahle International Gmbh | Exhaust gas cooler |
| WO2014048688A1 (en) * | 2012-09-25 | 2014-04-03 | Behr Gmbh & Co. Kg | Flat pipe |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008051268A1 (en) * | 2008-10-10 | 2010-04-15 | Mahle International Gmbh | cooling device |
| JP2012112579A (en) * | 2010-11-24 | 2012-06-14 | Mitsubishi Alum Co Ltd | Flat tube for heat exchanger and heat exchanger |
| JP5768795B2 (en) * | 2011-10-18 | 2015-08-26 | カルソニックカンセイ株式会社 | Exhaust heat exchanger |
| JP5764535B2 (en) * | 2012-07-13 | 2015-08-19 | 株式会社ユタカ技研 | Heat exchanger |
| JP5921413B2 (en) * | 2012-10-30 | 2016-05-24 | カルソニックカンセイ株式会社 | Tube for heat exchanger |
| US20160123683A1 (en) * | 2014-10-30 | 2016-05-05 | Ford Global Technologies, Llc | Inlet air turbulent grid mixer and dimpled surface resonant charge air cooler core |
| US10598382B2 (en) | 2014-11-07 | 2020-03-24 | United Technologies Corporation | Impingement film-cooled floatwall with backside feature |
| EP3270085B1 (en) * | 2016-07-12 | 2019-11-06 | Borgwarner Emissions Systems Spain, S.L.U. | Heat exchanger for an egr system |
| CN107192283B (en) * | 2017-05-11 | 2019-08-30 | 中国北方车辆研究所 | Combustion waste heat utilization heat exchange device of round tube-flat tube combination |
| US11098962B2 (en) * | 2019-02-22 | 2021-08-24 | Forum Us, Inc. | Finless heat exchanger apparatus and methods |
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| US6453989B1 (en) | 1999-05-31 | 2002-09-24 | Mitsubishi Heavy Industries, Ltd. | Heat exchanger |
| US6453988B1 (en) | 1999-07-28 | 2002-09-24 | Mitsubishi Heavy Industries, Ltd. | Heat exchanger and dimple tube used in the same, the tube having larger opposed protrusions closest to each end of tube |
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2009
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- 2009-12-15 JP JP2009283690A patent/JP5579428B2/en not_active Expired - Fee Related
- 2009-12-18 US US12/642,068 patent/US8627880B2/en not_active Expired - Fee Related
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| US6453989B1 (en) | 1999-05-31 | 2002-09-24 | Mitsubishi Heavy Industries, Ltd. | Heat exchanger |
| US6453988B1 (en) | 1999-07-28 | 2002-09-24 | Mitsubishi Heavy Industries, Ltd. | Heat exchanger and dimple tube used in the same, the tube having larger opposed protrusions closest to each end of tube |
| US6892806B2 (en) | 2000-06-17 | 2005-05-17 | Behr Gmbh & Co. | Heat exchanger for motor vehicles |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8627880B2 (en) | 2008-12-19 | 2014-01-14 | Mahle International Gmbh | Exhaust gas cooler |
| WO2012079701A1 (en) * | 2010-12-14 | 2012-06-21 | Daimler Ag | Exhaust heat exchanger of an internal combustion engine |
| WO2014048688A1 (en) * | 2012-09-25 | 2014-04-03 | Behr Gmbh & Co. Kg | Flat pipe |
| US10520261B2 (en) | 2012-09-25 | 2019-12-31 | Mahle International Gmbh | Flat pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2199722A3 (en) | 2010-08-25 |
| EP2199722B1 (en) | 2012-08-01 |
| JP2010144723A (en) | 2010-07-01 |
| JP5579428B2 (en) | 2014-08-27 |
| US20100162699A1 (en) | 2010-07-01 |
| DE102008064090A1 (en) | 2010-08-12 |
| US8627880B2 (en) | 2014-01-14 |
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